DE3739589A1 - Device for measuring the proportion of impurities in a flowing liquid - Google Patents
Device for measuring the proportion of impurities in a flowing liquidInfo
- Publication number
- DE3739589A1 DE3739589A1 DE19873739589 DE3739589A DE3739589A1 DE 3739589 A1 DE3739589 A1 DE 3739589A1 DE 19873739589 DE19873739589 DE 19873739589 DE 3739589 A DE3739589 A DE 3739589A DE 3739589 A1 DE3739589 A1 DE 3739589A1
- Authority
- DE
- Germany
- Prior art keywords
- cuvette
- cuvettes
- detector
- valve
- measuring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 8
- 239000012535 impurity Substances 0.000 title abstract 2
- 238000000034 method Methods 0.000 claims abstract description 6
- 230000005855 radiation Effects 0.000 claims description 6
- 230000033764 rhythmic process Effects 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 15
- 239000000835 fiber Substances 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 5
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 239000004020 conductor Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/85—Investigating moving fluids or granular solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
- G01N2015/0662—Comparing before/after passage through filter
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
- G01N21/03—Cuvette constructions
- G01N21/05—Flow-through cuvettes
- G01N2021/054—Bubble trap; Debubbling
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N2021/1748—Comparative step being essential in the method
- G01N2021/1751—Constructive features therefore, e.g. using two measurement cells
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/314—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry with comparison of measurements at specific and non-specific wavelengths
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/18—Water
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
Abstract
Description
Die Erfindung betrifft eine Vorrichtung zum Messen des Fremdstoffanteils in einer strömenden Flüssig keit, mit einem für den Prozeß über eine Leitung abgezweigten Flüssigkeitsstrom, der mit Hilfe einer Pumpe in eine Küvette gefördert wird, wobei der Küvette eine Strahlenquelle zugeordnet ist, deren Strahlenbündel die Küvette durchdringt und einem Detektor zugeleitet wird, wobei das elektrische Sig nal des Detektors von einer elektrischen Schaltung zu einem Erkennungssignal verarbeitet wird nach Patent (Patentanmeldung P 37 33 573.1). The invention relates to a device for measuring the amount of foreign matter in a flowing liquid with one for the process over a line branched liquid flow, which with the help of a Pump is pumped into a cuvette, the Cuvette is assigned a radiation source whose Beams penetrate the cuvette and one Detector is fed, the electrical Sig nal of the detector from an electrical circuit too a recognition signal is processed according to patent (Patent application P 37 33 573.1).
Es sind Vorrichtungen zum Messen der Fremdstoffkon zentration in einem Gasstrom bekannt, die der Prozeß kontrolle in Chemieanlagen, zur Rauchgasmessung und zur Emissionsmessung an Feuerungsanlagen und an Kraftfahrzeugen dienen. Diese bekannten Vorrichtungen arbeiten nach dem nichtdispersiven Ultraviolett- Absorptions-Meßverfahren. Als Meßeffekt dient die spezifische Strahlungsabsorption der Meßkomponente im UV-Bereich.They are devices for measuring the foreign substance con concentration in a gas stream known to be the process control in chemical plants, for flue gas measurement and for emission measurement on combustion plants and on Serve motor vehicles. These known devices work according to the non-dispersive ultraviolet Absorption measurement method. The serves as a measuring effect specific radiation absorption of the measuring component in the UV range.
Die UV-Strahlung wird in einer Hohlkathodenlampe er zeugt. Ein Blendenrad teilt die Strahlung in zwei zeitlich getrennte und ein Strahlenteiler in zwei räumlich getrennte Strahlungen. Auf einen Empfänger trifft dabei der Meßstrahl, der durch die Meßküvette geleitet wird. Der völlig unbeeinflußte Vergleichs strahl trifft auf den Korrekturempfänger.The UV radiation is in a hollow cathode lamp testifies. An aperture wheel divides the radiation into two temporally separated and one beam splitter into two spatially separated radiation. To a recipient the measuring beam strikes through the measuring cell is directed. The completely uninfluenced comparison beam hits the correction recipient.
Die elektronische Verarbeitung dieser vier Signale eliminiert die Einflußeffekte von nichtselektiven Absorptionen, wie zum Beispiel Küvettenverschmutzung und Alterungseffekte von Strahler und Empfänger.The electronic processing of these four signals eliminates the effects of non-selective effects Absorption, such as cuvette contamination and aging effects of emitter and receiver.
Der vorliegenden Erfindung liegt die Aufgabe zugrun de, eine Vorrichtung des eingangs genannten Typs so zu verbessern, daß Gasblasen im Probenstrom eli miniert werden. Die Vorrichtung soll preiswert her stellbar sein und vor allem auch nachträglich in bereits vorhandene Anlagen einbaubar sein.The present invention is based on the object de, a device of the type mentioned to improve so that gas bubbles in the sample stream eli be mined. The device is said to be inexpensive be adjustable and especially afterwards in existing systems can be installed.
Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß in die an die Küvette angeschlossene Flüssig keitsleitung für den Rückstrom ein Ventil einge schaltet ist, das elektrisch betätigbar ist, wobei das Signal zum schlagartigen Öffnen oder Schließen des Ventils von einem Signalgeber, beispielsweise einem Frequenzgenerator, erzeugbar ist. Weitere Merk male und Einzelheiten der Erfindung ergeben sich aus den Patentansprüchen.According to the invention, this object is achieved by that in the liquid connected to the cuvette line for the return flow, a valve is turned on is switched, which is electrically actuated, wherein the signal to open or close suddenly the valve from a signal transmitter, for example a frequency generator can be generated. Further remarks Male and details of the invention emerge from the patent claims.
Die Erfindung läßt die verschiedensten Ausführungs möglichkeiten zu; eine davon ist in der anhängenden Zeichnung schematisch näher dargestellt, die das Schaltbild für eine Vorrichtung zur laufenden Ermitt lung des Benzol-Anteils in durchfließendem Wasser zeigt.The invention allows the most varied execution opportunities to; one of them is in the attached Drawing shown schematically, the Circuit diagram for a device for ongoing investigation the benzene content in flowing water shows.
Die Vorrichtung besteht im wesentlichen aus einer vergleichsweise sauberes Eingangswasser führenden Rohrleitung 3, einem für einen Prozeß benötigten, nicht näher dargestellten Rohrleitungsblock, einer aus möglicherweise durch den Prozeß verunreinigte Ausgangswasser führenden Rohrleitung 5, den beiden Zweigleitungen 8, 9 und den in diese eingeschalte ten Pumpen 6, 7, den beiden Faserfiltern 10, 11, dem den Faserfiltern 10, 11 nachgeschalteten Wärme tauscher 12, den Zweigleitungen 14, 15, die an die Küvetten 16, 17 angeschlossen sind, der Lichtquelle 18 und den Detektoren 19, 29, den beiden Abflußlei tungen 20, 21, den in die Abflußleitungen einge schalteten Magnetventilen 22, 23 und schließlich dem Frequenzgenerator 13 und der Signalverarbeitung mit den Verstärkern 43, 44 und den Filtern 41, 42.The device consists essentially of a comparatively clean inlet water leading pipeline 3 , a pipeline block required for a process, not shown in detail, a pipeline 5 leading from possibly contaminated outlet water through the process, the two branch lines 8 , 9 and the pumps switched into them 6 , 7 , the two fiber filters 10 , 11 , the downstream of the fiber filters 10 , 11 heat exchanger 12 , the branch lines 14 , 15 , which are connected to the cuvettes 16 , 17 , the light source 18 and the detectors 19 , 29 , the two Abflußlei lines 20 , 21 , the switched into the drain lines solenoid valves 22 , 23 and finally the frequency generator 13 and the signal processing with the amplifiers 43 , 44 and the filters 41 , 42nd
Die Vorrichtung arbeitet wie folgt: Vom dem Rohr leitungsblock zufließenden Eingangswasser wird aus der Rohrleitung 3 über die Zweigleitung 8 von der Pumpe 6 ein Wasserstrom abgezweigt, der dann in den Faserfilter 10 und von dort aus in den Wärmetauscher 12 gefördert wird. Der vom Faserfilter 10 weitgehend blasenfrei gemachte, temperierte Wasserstrom wird nun durch die Küvette 16 und anschließend in die Abflußleitung 20 gefördert. Gleichzeitig wird vom Ausgangswasser über die Zweigleitung 9 ein zweiter Wasserstrom abgezweigt, der dann von der Pumpe 7 in den Faserfilter 11 und den Wärmetauscher 12 in die zweite Küvette 17 und anschließend in die Abflußlei tung 21 gedrückt wird.The device works as follows: From the pipeline block incoming inlet water is diverted from the pipeline 3 via the branch line 8 by the pump 6, a water flow which is then conveyed into the fiber filter 10 and from there into the heat exchanger 12 . The tempered water stream, which has been largely made bubble-free by the fiber filter 10 , is now conveyed through the cuvette 16 and then into the drain line 20 . At the same time, a second water flow is branched off from the initial water via the branch line 9 , which is then pressed by the pump 7 into the fiber filter 11 and the heat exchanger 12 into the second cuvette 17 and then into the drain line 21 .
Den beiden Küvetten 16, 17 ist eine UV-Lichtquelle 18 zugeordnet, deren Strahlen durch die Küvetten 16, 17 und das in diesen vorhandene Wasser hindurchdringen, da die vorderen und hinteren Stirnwände 25, 26 der Küvetten 16, 17 aus durchscheinendem Werkstoff ge fertigt sind.The two cuvettes 16 , 17 is assigned a UV light source 18 , the rays of which penetrate through the cuvettes 16 , 17 and the water present in them, since the front and rear end walls 25 , 26 of the cuvettes 16 , 17 are made of translucent material .
Zwischen den Küvetten 16, 17 und der UV-Lichtquelle 18 rotiert eine von einem Motor angetriebene Loch scheibe 30 derart, daß die Strahlenbündel 31, 32 abwechselnd auf einen halbdurchlässigen Spiegel 33 fallen, der diese auf die Detektoren 19, 29 lenkt.Between the cuvettes 16 , 17 and the UV light source 18 rotates a perforated disc 30 driven by a motor such that the beams 31 , 32 alternately fall on a semi-transparent mirror 33 which directs them to the detectors 19 , 29 .
Den Detektoren 19, 29 ist jeweils ein Lichtfilter 36 bzw. 37 für zum Beispiel 254 nm und 298 nm Wellen länge vorgeschaltet. Weiterhin sind Sammellinsen 38 bzw. 39 vorgesehen, die die Strahlenbündel 31, 32 auf die Detektoren 19 bzw. 29 lenken. Die von den beiden Detektoren 19, 29 erzeugten elektrischen Sig nale werden in der elektrischen Schaltung 41 bis 44 zu Signalen aufbereitet, die an den elektrischen Leitern 34, 35 und damit am Anzeigegerät 40 anstehen. Die Schaltung selbst weist RC-Filter 41, 42 und Ver stärkerteile 43, 44 auf, die die von den Detektoren 19, 29 gelieferten elektrischen Signale aufbereiten. The detectors 19 , 29 are each connected upstream of a light filter 36 or 37 for, for example, 254 nm and 298 nm wavelengths. Furthermore, converging lenses 38 and 39 are provided, which direct the beams 31 , 32 onto the detectors 19 and 29, respectively. The electrical signals generated by the two detectors 19 , 29 are processed in the electrical circuit 41 to 44 into signals which are present on the electrical conductors 34 , 35 and thus on the display device 40 . The circuit itself has RC filters 41 , 42 and amplifier parts 43 , 44 which process the electrical signals supplied by the detectors 19 , 29 .
Während die beiden Wasserströme von den Pumpen 6, 7 gleichmäßig durch die Küvetten 16, 17 gefördert werden, läuft das Chopper-Rad 30 mit gleichbleibender Geschwindigkeit um, so daß pro Chopper-Umdrehung jeweils vier Meßwerte parallel ermittelt werden können.While the two water flows from the pumps 6 , 7 are evenly conveyed through the cuvettes 16 , 17 , the chopper wheel 30 rotates at a constant speed, so that four measured values can be determined in parallel per revolution of the chopper.
Der Chopper 30 gibt abwechslungsweise den Strahlen gang zwischen Probenseite 17 und Referenzseite 16 frei, während die Signale für die spezifische Ab sorption und die nichtspezifische Absorption syn chron durch die zwei Detektoren 19, 29 ermittelt werden.The chopper 30 alternately releases the beam path between sample side 17 and reference side 16 , while the signals for the specific absorption and the non-specific absorption are determined synchronously by the two detectors 19 , 29 .
Im Bereich der vorstehend beschriebenen fotometri schen Flüssigkeitsanalyse, bei der die zu analysie rende Probe durch Analysenküvetten 16, 17 geleitet wird, um die Transmissionsänderungen der Probe zu erfassen, muß eine Blasenbildung innerhalb der Küvet ten 16, 17 unterbunden werden. Insbesondere bei der Analyse von Wasser, in der immer ein gewisser Anteil von Luft gelöst ist, ist die Lösung dieses Problems von besonderer Bedeutung.In the field of fluid analysis fotometri rule described above, wherein the yield is directed to and analyzed sample by sample cells 16, 17, to detect the changes in transmission of the sample must bubble formation within the Küvet th 16 can be suppressed 17th This problem is particularly important when analyzing water, in which a certain amount of air is always dissolved.
Bei der beschriebenen Vorrichtung läßt sich durch eine Förderung der zu analysierenden Probe im Druck- Puls-Betrieb die Neubildung von Bläschen erfolgreich verhindern. Blasen, die von dieser Einheit schon vorhanden sind, lassen sich mit einer Nebenstrom filtration 10, 11 entfernen. In the device described, the formation of bubbles can be successfully prevented by promoting the sample to be analyzed in the pressure-pulse mode. Bubbles that are already present from this unit can be removed with a secondary flow filtration 10 , 11 .
Im Ausgang der Küvetten 16, 17 befinden sich Magnet ventile 22, 23, die den Durchfluß im Rhythmus der Ansteuerung (≈1 Hz) unterbrechen. Befindet sich eine Blase in einer der Küvetten, so wird diese Blase durch Adhäsionskräfte an der Küvettenwand festgehal ten. Durch Schließen des Ventils 22 bzw. 23 wird diese Blase dann auf ein kleineres Volumen kompri miert. Durch die schlagartige Expansion in einer dritten Phase wird die Blase durch die gleichzeitig sprunghaft ansteigende Strömung mitgerissen, so daß in der letzten Phase keine Blase mehr vorhanden ist.In the output of the cuvettes 16 , 17 there are solenoid valves 22 , 23 which interrupt the flow in the rhythm of the control (≈1 Hz). If there is a bladder in one of the cuvettes, this bladder is held on the cuvette wall by adhesive forces. By closing the valve 22 or 23 , this bladder is then compressed to a smaller volume. Due to the sudden expansion in a third phase, the bubble is swept away by the suddenly rising current, so that in the last phase there is no longer any bubble.
Blasen, die sich in einem "Totwassergebiet" inner halb der Küvetten 16, 17 befinden, werden durch diese Maßnahme ebenfalls aus den Küvetten entfernt.Bubbles that are located in a "dead water area" within the cuvettes 16 , 17 are also removed from the cuvettes by this measure.
Auflistung der Einzelteile:List of items:
3 Rohrleitung für Eingangswasser
5 Rohrleitung für Ausgangswasser
6 Pumpe
7 Pumpe
8 Zweigleitung
9 Zweigleitung
10 Faserfilter
11 Faserfilter
12 Wärmetauscher
13 Frequenzgenerator
14 Zweigleitung
15 Zweigleitung
16 Küvette
17 Küvette
18 Lichtquelle
19 Detektor
20 Abflußleitung
21 Abflußleitung
22 Magnetventil
23 Magnetventil
24 UV-Lichtquelle
25 vordere Stirnwand
26 hintere Stirnwand
29 Detektor
30 Lochscheibe, Chopper
31 Strahlenbündel
32 Strahlenbündel
33 halbdurchlässiger Spiegel
(Strahlenteiler)
34 elektrischer Leiter
35 elektrischer Leiter
36 Lichtfilter
37 Lichtfilter
38 Sammellinse
39 Sammellinse
40 Anzeigegerät
41 RC-Filter
42 RC-Filter
43 Verstärker
44 Verstärker 3 pipe for inlet water
5 pipe for outlet water
6 pump
7 pump
8 branch line
9 branch line
10 fiber filters
11 fiber filters
12 heat exchangers
13 frequency generator
14 branch line
15 branch line
16 cuvette
17 cuvette
18 light source
19 detector
20 drain pipe
21 drain pipe
22 solenoid valve
23 solenoid valve
24 UV light source
25 front end wall
26 rear end wall
29 detector
30 perforated disc, chopper
31 beams
32 beams
33 semi-transparent mirror (beam splitter)
34 electrical conductors
35 electrical conductors
36 light filters
37 light filter
38 converging lens
39 converging lens
40 display device
41 RC filters
42 RC filters
43 amplifiers
44 amplifiers
Claims (3)
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19873739589 DE3739589A1 (en) | 1987-10-03 | 1987-11-23 | Device for measuring the proportion of impurities in a flowing liquid |
| US07/151,444 US4900152A (en) | 1987-11-23 | 1988-02-02 | Apparatus for measuring foreign substance content in a flowing liquid |
| EP88103671A EP0317697A3 (en) | 1987-11-23 | 1988-03-09 | Apparatus for measuring foreign components in flowing liquids |
| JP63293768A JPH01165939A (en) | 1987-11-23 | 1988-11-22 | Apparatus for measuring foreign matter contained in fluidizing liquid |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19873733573 DE3733573A1 (en) | 1987-10-03 | 1987-10-03 | DEVICE FOR MEASURING THE NON-SUBSTANCE PART IN FLOWING LIQUIDS |
| DE19873739589 DE3739589A1 (en) | 1987-10-03 | 1987-11-23 | Device for measuring the proportion of impurities in a flowing liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE3739589A1 true DE3739589A1 (en) | 1989-06-01 |
Family
ID=25860486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19873739589 Withdrawn DE3739589A1 (en) | 1987-10-03 | 1987-11-23 | Device for measuring the proportion of impurities in a flowing liquid |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE3739589A1 (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE724121C (en) * | 1935-11-01 | 1942-08-19 | Fritz Toedt Dr Ing | Device for continuous analytical testing of flowing liquids |
| US2964992A (en) * | 1956-02-07 | 1960-12-20 | Du Pont | Differential refractometer cell |
| US2992077A (en) * | 1958-09-15 | 1961-07-11 | Milton Roy Co | Expansible volume analyzer sample cell for colorimetric analyzers |
| GB979850A (en) * | 1960-06-03 | 1965-01-06 | Onera (Off Nat Aerospatiale) | Improvements in methods and apparatus for measuring the relative amount of a given component of a mixture of substances by selective absorption of infrared radiation |
| DE1498708A1 (en) * | 1963-03-21 | 1969-02-06 | Hans Ellner Fa | Testing device for testing liquids |
| DE2512538A1 (en) * | 1975-03-21 | 1976-09-30 | Bosch Gmbh Robert | Optical density measurements of diesel exhaust gas - utilise heated rotating discs in front of measuring chamber orifices (SW120176) |
| US4013953A (en) * | 1973-04-19 | 1977-03-22 | Environment/One Corporation | Optical fluid contamination and change monitor processing circuit |
| DE3023625A1 (en) * | 1979-06-25 | 1981-01-15 | Thermo Electron Corp | SYSTEM FOR MONITORING THE CONCENTRATION OF A SPECIFIC GAS IN A (ENVIRONMENTAL) SAMPLE |
| DE3132163A1 (en) * | 1981-08-14 | 1983-03-03 | Bayer Ag, 5090 Leverkusen | DEVICE FOR THE CONTINUOUS EXAMINATION OF CHEMICAL REACTION PROCESSES BY MEANS OF INFRARED (IR) ABSORPTION |
| DE2328328C2 (en) * | 1973-06-04 | 1985-08-29 | Bolander, Ivar, Wayzata, Minn. | Device for determining the degree of pollution of natural waters and sewage |
-
1987
- 1987-11-23 DE DE19873739589 patent/DE3739589A1/en not_active Withdrawn
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE724121C (en) * | 1935-11-01 | 1942-08-19 | Fritz Toedt Dr Ing | Device for continuous analytical testing of flowing liquids |
| US2964992A (en) * | 1956-02-07 | 1960-12-20 | Du Pont | Differential refractometer cell |
| US2992077A (en) * | 1958-09-15 | 1961-07-11 | Milton Roy Co | Expansible volume analyzer sample cell for colorimetric analyzers |
| GB979850A (en) * | 1960-06-03 | 1965-01-06 | Onera (Off Nat Aerospatiale) | Improvements in methods and apparatus for measuring the relative amount of a given component of a mixture of substances by selective absorption of infrared radiation |
| DE1498708A1 (en) * | 1963-03-21 | 1969-02-06 | Hans Ellner Fa | Testing device for testing liquids |
| US4013953A (en) * | 1973-04-19 | 1977-03-22 | Environment/One Corporation | Optical fluid contamination and change monitor processing circuit |
| DE2328328C2 (en) * | 1973-06-04 | 1985-08-29 | Bolander, Ivar, Wayzata, Minn. | Device for determining the degree of pollution of natural waters and sewage |
| DE2512538A1 (en) * | 1975-03-21 | 1976-09-30 | Bosch Gmbh Robert | Optical density measurements of diesel exhaust gas - utilise heated rotating discs in front of measuring chamber orifices (SW120176) |
| DE3023625A1 (en) * | 1979-06-25 | 1981-01-15 | Thermo Electron Corp | SYSTEM FOR MONITORING THE CONCENTRATION OF A SPECIFIC GAS IN A (ENVIRONMENTAL) SAMPLE |
| DE3132163A1 (en) * | 1981-08-14 | 1983-03-03 | Bayer Ag, 5090 Leverkusen | DEVICE FOR THE CONTINUOUS EXAMINATION OF CHEMICAL REACTION PROCESSES BY MEANS OF INFRARED (IR) ABSORPTION |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1342070B1 (en) | Method for detecting a gas using an infrared gas analyzer and gas analyzer suitable for carrying out said method | |
| EP0310740A2 (en) | Apparatus for measuring components in flowing liquids | |
| DE4220997C2 (en) | Device for analyzing particles in the exhaust gas of an internal combustion engine | |
| EP1472521A1 (en) | Method for analysing liquids, in addition to a device therefor | |
| WO2006002740A1 (en) | Non-dispersive infrared gas analyzer | |
| DE2543726A1 (en) | DEVICE FOR DETECTION OF GAS-FORMED POLLUTION | |
| DE3604815C2 (en) | ||
| DE2648450C2 (en) | Device for measuring the optical adsorption capacity of a sample fluid | |
| EP0317697A2 (en) | Apparatus for measuring foreign components in flowing liquids | |
| DE2649190A1 (en) | INFRARED ANALYZER | |
| DE19502674C1 (en) | Ion mobility spectrometer with internal gas chromatography column | |
| AT409039B (en) | METHOD FOR MEASURING OPACITY IN GASES | |
| DE3226063C2 (en) | Method and device for flow analysis | |
| DE3739589A1 (en) | Device for measuring the proportion of impurities in a flowing liquid | |
| DE3525700A1 (en) | METHOD AND DEVICE FOR CHEMILUMINESCENCE ANALYSIS | |
| DE19607062A1 (en) | Gas concentration determination method | |
| EP2452175B1 (en) | Measuring device for measuring exhaust gas | |
| DE102009054594A1 (en) | Device for determining particle size and/or particle concentration of exhaust gas of motor vehicle, has color sensor/spectral analyzer detecting intensities of wavelength region of stray light portions of region of gas flow duct | |
| DE2425877C3 (en) | Turbidity measuring device | |
| DE3530669A1 (en) | Method and device for recording gas exchange processes in intact plants | |
| EP3112845A1 (en) | Device for optical in situ analysis of a measuring gas | |
| DE10159616A1 (en) | High-sensitivity electrochemical detector for arsine and phosphine, includes absorber removing gases to which sensor exhibits cross-sensitivity | |
| DE3515258C2 (en) | ||
| DE4433092C1 (en) | Determining concentration of differently sized particle-dust aggregates in aerosol | |
| DE202010010042U1 (en) | Device for photometric measurement in gases and liquids |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AF | Is addition to no. |
Ref country code: DE Ref document number: 3733573 Format of ref document f/p: P |
|
| OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
| 8127 | New person/name/address of the applicant |
Owner name: ROSEMOUNT GMBH & CO, 6450 HANAU, DE |
|
| 8130 | Withdrawal |